Joint-fastener.



PATBNTED JUNE 30, 1908.

2 SHEETS-SHEET 1.

[NI ENTOR 0.3. TRAUB. JOINT FASTBNBR. APPLIOATION FILED JUNE 8. 1907.

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WITNESSES No. 892,338. PATENTED JUNE 30, 1903.

JOINT FASTENER.

APPLICATION FILED JUNE 8. 1907.

2 SHEETS-SHEET 2.

% I 1 I I 22 i 23 I/VITNESSES; [/VVIZ/VTO/G W CbarZeJ'J I 2 0203reference indicate I cut CHARLES J. TRAUB,OF CINCINNATI, OHIO.

JOINT-FASTENER.

b ecltication or Letters Patent.

atented June 30, 1908.

Application filed June 8, 190'2". Serial No. 377,991.

and useful improvement in Joint-Fasteners,"

of which the following is a specification.

' This invention relates to fasteners, and more particularly tofasteners for the joints of furniture etc., in which it is desiredthatthe fastcnings be invisible, and has for its object to provide afastener of this kind which will be simple and cheap, which may beeasily placed in position, and which, when so placed, will be entirelyinvisible.

Other objects and advantages will be apparent from the followingdescription and it Wlll be understood that changes in the specificstructure shown and described may be made within the scope. of theclaims without (10 )arting from the spirit of the invention. 4

n the drawings forming a portion of this specification, and in whichlike numerals of similar parts in the sev eral views, Figure 1 1s asectional view fasten two pieces of wood together; Fig. 2 is anelevational view of the fastener, showing the correlatimi of the twomen'ibers; Fig. 3 is an elevational view showing the inserting memberand key in use in connection with one of the threaded members'yFig, 4 isa perspective view of the inserting member; ig. 5 is an elevational viewof the threaded member which carries the locking jaws.

Referring now to the drawings, the pres invention comprises twoexteriorly threaded cylindrical members 5 and (i, the member (5 having alongitudinal passage 7 formed thcrethrough, as shown. The two membersare gradually reduced at their outer end portions, as shown at 5 and 6respectively, and at its inner end, the member 5 carries a cylindricalstem 8, which projects therefrom and which is bifurcated as shown at 8.

A pair of jaw members 9 are provided, each consisting of an outer flatportion 9 and an inner flat portion 9, the portions of each jaw memberextending at right angles to each other. The two jaw members aredisposed with their outer portions 5) in approximately parallelrelation, and with their inner portions 9 overlapped and engaged in thebifurcation S o the stem 8.

The bifurcation of this stem results in spaced 'which open through thefingers S, as shown, between whicl'i the portions 9 of the aw membershe, and a pivot pin 10 is engaged transversely through these fingers andthe portions 9 of the jaw members, adjacent to the inner ends thereof. Atransverse pin 1] is engaged in thefingers 8 adjacent to their outerends and is. re ceived in registering openings 12 formed in the nations9 of the jaw members adjacent to the. outer .cnds tl'iereof. Theopenings 12 are slightly elongated transversely of the portions 9 sothat the jaw members have slightpivotal movement. towardand away fromeach other upon the pin 10.

Sockets 13 are formed in the inner faces of the. jaw members adjacent'totheir free extremities, and receive a helical spring 14, which thusholds the jaw members with their outer ends yieldably in spacedrelation. Jaws 15 are carried by the outer end portions of the jawmembers, and extend outwardly in opposite directions. These. jaws havestraight faces 16 at their inner ends and forwardly convergent faces 17,as shown.

Formed in the surface of the member 5 at diametrically opposite points,there are a pair of longitudinally innen end of the member. Theserecesses have oppositely.

extending lateral extensions 18 at their distal ends from the inner endof the membenas shown. These recesses with their extensions, aredesigned. to receive correspondingly formed fingers 19 carried by whatmay be termed an inserting member 20, these fingers being located at oneend of the inserting member and projecting longitudinally therefrom atopposite sides of a central longitudinally extending recess 21 arrangedto receive the jaw members i) and the stem 8, in order that the fingers1.) may be engaged in the recesses 16.

,The inserting member 20 is cylindrical in form, and has lateralprojections 22 at opposite points between its ends, for engagement innotches 23 formed in a key 24. This key consists of a hollow cylindricalmember open at one end as shown at 25, and it is at this open end thatthe notches 23 are formed. Adjacent to the opposite end of the member, atransverse rod 26 is enga ed therethrough, by which the key may beturned. As will be understood, the cylindrical member is arranged toreceive theportion of the inserting member 20 at either sideof theprojections 22, thcrewithin.

extending recesses 16 1 ihmember 6 a longitudinal passage rriedtherethrough, as previously stated, d inner this member 6 is bifurspacedportions 27, each of evined with a lateral projection 'nd. Theseprojections 27" at opposite sides of the portions s aces are formedwhich are in The inerting member carries a cony located outwardlyprojecting stem 29 at its opposite eno from the fingers 19, and at thebase of this stem 29, there are formed laterally projecting angularenlargements 36 of a and form to engage in the spaces 28. Thearrangement is such ll at the stem 29 may be engaged in the passage 7with the enlargements between the edges of the portions 27, whenrotation of the inserting member carry the member 6 therewith,

will be readily understood. The inserting member 20 is of somewhatgreater diameter than the members 5 and 6, for a purpose which. will belater described.

As will be seen from the drawings, the passage 7 is primarily designedto receive thej aw members 9 and the stem 8 therewithin, and thearrangement is such that when the two members 5 and 6 are in mutualengagement at their inner ends, the jaws 15 lie outwardly of the member6 and with their faces 16 against the outer ends of this member, to holdthe two members against separation;

in use, when it is desired to join two-pieces of wood, the surfaces tobe fastened together, bored into to form recesses disposed to be broughtinto registration. The inserting member is then engaged with the member5 and the latter is screwed into one ofthe recesses until the end of theinserting member engages the surface of the wood surrounding wi llassess the recess. The inserting member is then disengaged from themember 5 and engaged with. the member 6, the latter being screwed intothe other recess} The jaw members are then inserted in the passage 7 ofthe member 6 andthe two pieces of wood brought together, when the jaws15 will lock the members 5 and 6 against separation, as described above.I

riorly threaded members, a stem carried by one of said members andbifurcated to form spaced fingers, a pair of jaw members pivoted betweenthe fingers, means for limiting the outward movement of the jaw members,a sprin' arranged to hold the jaw members yieldab y againstinwardmovement, and jaws carried by the outer ends of said jaw members, theother of said threaded members being hollow for the reception of the jaw members and the bifurcated stem, said jaw members being arranged tolie with their jaws against the outer end of the hollow iember when theinner ends of the two first named members are in mutual engagement. Intestimony whereof I aflix my signature, in presence of two witnesses.

CHARLES J. TRAUB.

Witnesses:

EDWARD TRAUB, JOHN TRAUB, Sen.

